package com.hmdp.interceptor;

import com.hmdp.utils.UserHolder;
import org.springframework.web.servlet.HandlerInterceptor;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //1.判断是否需要拦截(ThreadLocal中是否有由用户)
        if (UserHolder.getUser() == null){
            //没查到 需要拦截
            response.setStatus(401);
            //拦截
            return false;
        }

        //有用户，则放行
        return true;

    }

}
